STK55C324

Syntek Semiconductor Co., Ltd. Specification 1. FEATURES : STK55C324 * Operating voltage : 2.5V – 5.5 V. * Maximum CPU operating frequency : 2MHz at 2.7V * Dual oscillators : - RC or 32.768 KHz crystal oscillator for LCD display and watch timer. - RC oscillator for system clock. * 40 segments and 8 commons output for LCD driver. - 1/4 bias, 1/8 duty and 64Hz frame frequency. - 16 levels contrast control. * I/O port. - 8 I/O pins with selectable wake up interrupt. - Two output pins. These two pins can be set as sound channel DAC outputs. * Built in 160 bytes data RAM and 40 bytes display RAM. * Built in 32K bytes ROM for program. * One 8-bit timer with 8 predefined input clock. * Two sound generators with 7-bit D/A output. * Four interrupt sources : NMI - 64 Hz interrupt IRQ1 - Fix-time timer interrupt IRQ2 - Timer interrupt IRQ3 - External interrupt * Code option : - Built-in 150K OHM pull-up resistors for I/O port. - RC or 32768Hz crystal oscillation for LCD driver. 2. APPLICATION : * Calculator * Hand-held game * Small instrument * Toy LCD Controller 1 /24 Issue date: 13 August, 1999 Syntek Semiconductor Co., Ltd. 3. BLOCK DIAGRAM : STK55C324 OSC1 OSC2 32768Hz RC oscillator 8-bit CPU Clock Generator ROM 32Kx8 LCD driver with 4-bit contrast control CONTRAST C0-C7 S0-S39 RAM 160x8 LCD RAM 40x8 A0-A15 Address decoder D0-D7 IRQ 8-bit Timer Port 1 Two sound generator with 7-bit D/A P10-P17 SOUND1 SOUND2 LCD Controller 2 /24 Issue date: 13 August, 1999 ...